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From: bob smith <b...@coolfone.comze.com>
Newsgroups: comp.graphics.api.opengl
Subject: Re: non-power of two textures
Date: Tue, 31 Jul 2012 07:02:30 -0700 (PDT)
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On Tuesday, July 31, 2012 8:43:16 AM UTC-5, Nobody wrote:
> On Mon, 30 Jul 2012 12:57:28 -0700, bob smith wrote:
> 
> 
> 
> >> 	if (strstr(glGetString(GL_EXTENSIONS),
> 
> >> 	           "GL_ARB_texture_non_power_of_two"))
> 
> >> 	    ...
> 
> > 
> 
> > For some reason, it doesn't like this:
> 
> > 
> 
> > glGetString(GL_EXTENSIONS);
> 
> > 
> 
> > It returns 0.
> 
> 
> 
> Have you created and bound a context at the point that you call it?
> 
> 
> 
> Also, in 3.x and later "core profile", glGetString(GL_EXTENSIONS) is no
> 
> longer valid (it will fail with GL_INVALID_ENUM). Instead, you need to
> 
> use glGetStringi(), e.g.:
> 
> 
> 
> 	GLint count;
> 
> 	GLuint i;
> 
> 	glGetIntegerv(GL_NUM_EXTENSIONS, &count);
> 
> 	for (i = 0; i < count; i++)
> 
> 	    if (strcmp(glGetStringi(GL_EXTENSIONS, i),
> 
> 	               "GL_ARB_texture_non_power_of_two") == 0)
> 
> 	        ...

Yes, glGetString(GL_EXTENSIONS) did fail with GL_INVALID_ENUM.

Here's a list of the extensions on my Macbook Pro:

GL_ARB_instanced_arrays...
GL_ARB_occlusion_query2...
GL_ARB_shader_bit_encoding...
GL_ARB_timer_query...
GL_EXT_texture_compression_s3tc...
GL_EXT_texture_filter_anisotropic...
GL_EXT_texture_sRGB_decode...
GL_APPLE_client_storage...
GL_APPLE_container_object_shareable...
GL_APPLE_object_purgeable...
GL_APPLE_rgb_422...
GL_APPLE_row_bytes...
GL_APPLE_texture_range...

I guess my textures have to be power of two?

Seems weird cause I just bought this thing.